加密和解密没有特殊字符 [英] Encryption and decryption without special character

问题描述

大家好..

我想加密邮件ID。加密的邮件ID不应包含特殊字符。

我用过这个：

  string  EncryptedEmailId; 
  string  EncryptionKey =   MAKV2SPBNI99212; 
  byte  [] EmailIdEncrypt = Encoding.Unicode.GetBytes（InvEmail）; 
 
 使用（Aes encryptor = Aes.Create（））
 {
 Rfc2898DeriveBytes pdbEncrypt =  new  Rfc2898DeriveBytes（EncryptionKey， new   byte  [] {0x49,0x76 ，0x61,0x6e，0x20,0x4d，0x65,0x64,0x76,0x65,0x64,0x65,0x76}）; 
 encryptor.Key = pdbEncrypt.GetBytes（ 32 ）; 
 encryptor.IV = pdbEncrypt.GetBytes（ 16 ）; 
 使用（MemoryStream msEncrypt =  new  MemoryStream（））
 {
 使用（CryptoStream csEncrypt =  new  CryptoStream（msEncrypt，encryptor.CreateEncryptor（），CryptoStreamMode.Write）） 
 {
 csEncrypt.Write（EmailIdEncrypt， 0 ，EmailIdEncrypt.Length）; 
 csEncrypt.Close（）; 
} 
 EncryptedEmailId = Convert.ToBase64String（msEncrypt.ToArray（））; 
} 
} 
 individualContent = individualContent.Replace（  [MailId]，EncryptedEmailId）; 

这是生成带有特殊字符的邮件ID。



请帮助我。

解决方案

加密总是产生特殊字符，因为它将输入（从文本或其他任何内容）转换为集合字节 - 不是字符，它们是8位值，可能包含有效字符，但更可能不包含。



尝试将字节数组转换为 Base64 [ ^ ] - 只包含可读字符。

<集团kquote>我从这里得到了我的答案： http://www.nullskull.com/faq/834/convert-string-to-hex-and-hex-to-string-in-net.aspx [ ^ ]



a）将字符串转换为Hex

  public   static   string  ConvertStringToHex（ String 输入，System.Text.Encoding encoding）
 {
  Byte  [] stringBytes = encoding.GetBytes（input）; 
 StringBuilder sbBytes =  new  StringBuilder（stringBytes.Length *  2 ）; 
  foreach （ byte  b  in  stringBytes）
 {
 sbBytes.AppendFormat（  {0：X2}，b）; 
} 
  return  sbBytes.ToString（）; 
} 

b）将Hex转换为字符串

  public   static   string  ConvertHexToString（ String  hexInput，System.Text.Encoding encoding）
 {
  int  numberChars = hexInput.Length; 
  byte  [] bytes =  new   byte  [numberChars /  2 ]; 
  for （ int  i =  0 ; i <  numberChars; i + =  2 ）
 {
 bytes [i /  2 ] = Convert.ToByte（hexInput.Substring（i， 2 ）， 16 ）; 
} 
  return  encoding.GetString（bytes）; 
} 

样本使用代码

  string  testString =   MIKA @？& ^; 
  string  hex = ConvertStringToHex（testString，System.Text.Encoding.Unicode）; 
  string  normal = ConvertHexToString（hex，System.Text.Encoding.Unicode）; 
 Debug.Assert（testString.CompareTo（normal）==  0 ， 它们不相同）; 

Hi guys..
I want to encrypt mail id. The encrypted mail id should not contain special characters.
I have used this:

string EncryptedEmailId;
                            string EncryptionKey = "MAKV2SPBNI99212";
                            byte[] EmailIdEncrypt = Encoding.Unicode.GetBytes(InvEmail);

                            using (Aes encryptor = Aes.Create())
                            {
                                Rfc2898DeriveBytes pdbEncrypt = new Rfc2898DeriveBytes(EncryptionKey, new byte[] { 0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76 });
                                encryptor.Key = pdbEncrypt.GetBytes(32);
                                encryptor.IV = pdbEncrypt.GetBytes(16);
                                using (MemoryStream msEncrypt = new MemoryStream())
                                {
                                    using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor.CreateEncryptor(), CryptoStreamMode.Write))
                                    {
                                        csEncrypt.Write(EmailIdEncrypt, 0, EmailIdEncrypt.Length);
                                        csEncrypt.Close();
                                    }
                                    EncryptedEmailId = Convert.ToBase64String(msEncrypt.ToArray());
                                }
                            }
                            individualContent = individualContent.Replace("[MailId]", EncryptedEmailId);

This is producing mail id with special characters.

Please help me.

解决方案

Encryption always produces "special characters" because it converts the input (from text or whatever it was) to a collection of bytes - which aren't characters, they are eight bit values which may contain valid characters but are more likely not to.

Try converting the byte array to Base64[^] - that will contain only "readable" characters.

I got my ans from here:http://www.nullskull.com/faq/834/convert-string-to-hex-and-hex-to-string-in-net.aspx[^]

a) Convert String to Hex

public static string ConvertStringToHex(String input, System.Text.Encoding encoding)
    {
         Byte[] stringBytes = encoding.GetBytes(input);
        StringBuilder sbBytes = new StringBuilder(stringBytes.Length * 2);
        foreach (byte b in stringBytes)
         {
             sbBytes.AppendFormat("{0:X2}", b);
        }
        return sbBytes.ToString();
    }

b) Convert Hex to String

public static string ConvertHexToString(String hexInput, System.Text.Encoding encoding)
    {
         int numberChars = hexInput.Length;
        byte[] bytes = new byte[numberChars / 2];
         for (int i = 0; i < numberChars; i += 2)
        {
            bytes[i / 2] = Convert.ToByte(hexInput.Substring(i, 2), 16);
         }
         return encoding.GetString(bytes);
    }

Sample usage code

string testString = "MIKA@?&^";
    string hex = ConvertStringToHex(testString, System.Text.Encoding.Unicode);
    string normal = ConvertHexToString(hex, System.Text.Encoding.Unicode);
    Debug.Assert(testString.CompareTo(normal) == 0, "They are not identical");

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